Canon PIXMA MP520 MP520 series Quick Start Guide - Page 54
When Printing Becomes Faint or Colors Are Incorrect, Step 1 - screen problem
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When Printing Becomes Faint or Colors Are Incorrect When printing becomes faint or colors are incorrect even if ink remains in the ink tanks, the print head nozzles are probably clogged. Print the nozzle check pattern to confirm the condition of the nozzles and then perform Print Head Cleaning. If print results are not satisfactory, performing Print Head Alignment may improve print quality. Note Before performing maintenance z Open the Scanning Unit (Printer Cover) and make sure that all lamps for the ink tanks are lit red. If not, see "Getting the Ink Status Information" on page 43 and take the appropriate action. z Increase the Print Quality setting in the printer driver settings. See "Print Results Not Satisfactory" on page 73. Step 1 See "Printing the Nozzle Check Pattern" on page 51. If lines are missing or if white streaks appear Step 2 See "Print Head Cleaning" on page 54. If the problem is not resolved after performing Print Head Cleaning twice After cleaning the Print Head, print and examine the nozzle check pattern. Step 3 See "Print Head Deep Cleaning" on page 55. Note If Print Head Deep Cleaning does not resolve the problem, the Print Head may be damaged. Contact your Canon service representative. z If the Ruled Lines Are Shifted See "Aligning the Print Head" on page 56. Note You can also perform the maintenance operation from your computer. For details, refer to the PC Printing Guide on-screen manual. 50 Routine Maintenance